I'd like to develop an heartbeat function in my app, allowing me to see which users are "online" or available to receive push from pushwoosh.

Is there a way to get that information in the API ? Our app is based of Parse and we're using Pushwoosh to send push to the user from Parse. If I could get a list of which devices are currently online I could probably figure out which users are online within Parse and make an interface, allowing us to see if someone turned off his push notifications or removed the app.